What position should the manual override arm be turned to during an engine emergency shutdown?

During an engine emergency shutdown on the F/A-18 E/F, the manual override arm should be turned clockwise to the closed position. This action is crucial because it effectively secures or closes the fuel flow, which is vital in preventing further engine damage or potential fire hazards after an emergency situation has occurred. Turning the manual override arm to the closed position helps to immediately cut off the fuel supply to the engine, providing a rapid response to the emergency and ensuring that the situation does not escalate.

This procedure is part of emergency protocols designed to protect both the aircraft and the crew, underlining the importance of prompt and precise actions during critical situations. Understanding the rationale behind this step reinforces the need to adhere to established safety practices when dealing with potential engine malfunctions.